Preparation method of solid composite water purification agent

Abstract

The invention relates to a preparation method of a solid composite water purification agent. The preparation method includes evenly mixing raw materials, including a solid raw material iron vitriol, sulfuric acid and water, according to the ratio of 5:4:1, pumping the solution into a closed reaction container by a pump, adding 100kg of sodium nitrite solutions into each cube of the mixed solution,performing oxygenation under normal pressure, stirring the mixed solution to consume 65kg of oxygen, increasing the reaction temperature continuously by heat released during reaction, and generatingNO and NO2, wherein the reaction pressure is 1.5kg / cm<2>, the reaction time is 3-4 hours, and the reaction temperature is 30-90 DEG C; after reaction, pumping the reaction solution into a stabilizingtank for temporary storage by the pump, adding 100kg of sodium chlorate solutions into the stabilizing tank, performing stabilizing and curing for 4 hours, and filtering the cured solution by a sheetframe to obtain the efficient liquid water purification agent, wherein the adding ratio of the sodium chlorate solutions is 10%; preparing the spherical-particle solid composite water purification agent according to a spray-drying method. Compared with conventional ferric sulfate, the prepared solid composite water purification agent has the advantages that total phosphorus in waste water is removed, and the COD removal effect is good.

Description

technical field [0001] The invention relates to the technical field of water purifiers, in particular to a preparation method of a solid composite water purifier. Background technique [0002] At present, a large amount of chemical agents are used in the process of sewage treatment, including polyaluminum chloride and polyferric sulfate, among which polyferric sulfate is yellow powder. The role of polyferric sulfate as a water purifier is to remove total phosphorus in the sewage treatment process, but the removal effect on pollutant index COD is poor, especially for COD removal in difficult-to-treat industrial wastewater. It is an urgent need for sewage treatment plants to produce a composite water purifying agent, and there will be a wide market. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a preparation method of a solid composite water purifier, the prepared water purifier has good COD and total phosphorus...

AI Technical Summary

Problems solved by technology

The role of polyferric sulfate as a water purifier is to remove total phosphorus in the sewage treatment process, but the removal effect on the pollutant indicator COD is poor, especially for the removal of COD in difficult-to-treat industrial wastewater